Porous paper powder puff package



P 8 w. A. HERMANSON ETAL 2,852,795

I r POROUS PAPER POWDER PUFF PACKAGE 2 Sheets-She et 1 Filed May 3, 1955INVENTORS GERALD I HER/MANS N A. HwMA/usw [zen/n WOLf HIS ATTORNEY Sept;23, 1958 W. A. HERMANSON ETAL POROUS PAPER POWDER PUFF PACKAGE 2Sheets-Sheet 2 Filed May 5, 1955 INVENTOR. 01/

"nited States Patent Patented Sept. 23, 1958 POROUS PAPER POWDER PUFFPACKAGE William A. Hermanson, Brookline, and Gerald I. Hermanson,Newton, Mass.

Application May 3, 1955, Serial No. 505,697

6 Claims. (Cl. -1311) The present invention relates to a containerformed of porous paper material adapted to contain talc or similarpowder which is to be disposed of through the pores of the package.

It is an object of the present invention to provide a disposable paperpacket containing a small quantity of face powder, talc or other similarfinely ground powder which may be dispensed through pores in the wallsof the packet. Such a structure has a substantial advantage when used asa powder puff over the conventional powder puff made of fabric, feathersor down; since continued use of such conventional powder puffs isattended with a build up of oils, greases, or organic secretions. Thepresent invention, however, provides a container of paper material whichhas a relatively smooth outer surface on which foreign material will notaccumulate as readily as in the case of the conventional powder puff.

One problem in using paper as an envelope to contain finely groundfacial powder or talc, is to provide a paper which will permit thepowder to sift through it only when subject to mechanical action as whenpatted against the skin or other object, and to retain the powder withinthe envelope at such times as the envelope is not in use.

If a single thickness of paper is used having a close or compactformation, the powder will not readily sift through when the puff is inuse.

On the other hand, paper formed from long vegetable fibers having aporous structure, permits powder to sift through continuously, makingsuch a puff quite undesirable to carry.

The present invention overcomes this difliculty by forming a powder puffenvelope of a combination of a creped cellulosic web and a paperformation made of long vegetable fibers. These two webs of material arejoined together by a thermoplastic material previously adhered to thevegetable fiber web.

The laminated structure of the creped cellulosic web, long vegetablefibers and thermoplastic material is then formed into an envelope bytaking several of these laminated sheet structures and securing themtogether in a desired shape by heat sealing the edges, after previouslydepositing between the laminated sheet structures a quantity of thedesired powder. It should be noted in the sealing process the selectionof the creped cellulose having a low density and high porosity isextremely important insofar as it permits the thermoplastic materialpreviously bonded to the long fiber formation to flow entirely throughthe creped cellulose. This feature thereby permits the heat sealing ofthe envelope at its periphery by heating the adjacent sheet andsubjecting it to the pressures of the heat-sealing equipment until thethermoplastic layers fiow through their respective adjacent crepecellulose layers to combine with one another, forming a suificientlystrong enough heat seal to permanently secure the edges of the bagtogether.

These and other objects of the present invention will be more clearlyunderstood when considered in connection with the drawings, in which:

Figure l is an enlarged perspective view of a segment of the compositesheet,

Figure 2 is a fragmentary perspective view of the powder puff pack, and

Figure 3 is a sectional view of the present invention.

in order to provide a proper control of the dispensing of finely groundpowders, such as talc or other facial powders, through the wall of apaper-formed envelope, it has been found preferable to provide a wall oflaminated sheets of paper. Accordingly, the applicant has provided inthe present invention an envelope formed of facing walls 1 and 2. Thesewalls may have any desirable shape such as round, square or oblong. Butfor convenience, they are illustrated in the present invention as beingsubstantially square or rectangular in nature. Between these walls islocated a quantity of powder which may be dispensed through either wall1 or 2. This powder is the usual commercial finely ground facial ortalcum powder. The walls 1 and 2 are sealed together along their innersurfaces at their periphery in a manner hereinafter more fully setforth.

Each of these walls comprises an inner layer of a creped cellulosic web4 having a thickness of P eferably .002 inch to .005 inch. This crepedcellulosic web has a high porosity and has a formation of very lowdensity.

The outer surfaces of the walls 1 and 2 are formed of a composite sheetof material 5 comprising an outer web of long vegetable fibers having aporosity in excess of 25 cubic feet per square foot per minute at apressure drop of .5 inch column of water. This long vegetable fiber webhas wet strength properties and is covered on its inner side with athermoplastic material preferably Vinyon fibers. Vinyon is athermoplastic fiber material manufactured by the American Viscose Corp.being a copolymer of vinyl chloride and vinyl acetate. This compositesheet of long vegetable fiber and Vinyon fiber has an overall thicknessof preferably between .00225 inch to .003 inch. The composite sheet 5 isbonded to the cellulosic web 4 prior to the forming of the envelope bylaying the cellulosic web against the thermoplastic side of the longfiber web and applying heat within a range of 325 F. to 370 F. Underthis process, a good bond will take place and a laminated web resultshaving an overall thickness in the order of .00425 inch to .008 inch.The envelope is then formed with a quantity of powder enclosed byconventional means after which the periphery of the envelope is sealedby applying heat to it. With sufiicient application of heat andpressure, the Vinyon will flow through the orifices of the crepedcellulosic web to bond to the creped cellulosic web of the opposite walland to the Vinyon of the opposite wall.

It has been found that the combined thickness of the two webs issomewhat critical in nature in properly controlling the flow of powderparticles through the walls when subject to a mechanical action such astapping against the users skin. It has been found that unless such amechanical action is applied for a short period of time the powderparticles will be retained within the crepe folds of the innercellulosic Web, thus permitting the envelope to be carried in the pocketor purse without danger of the powder sifting through the walls.

It has also been found in the present invention that the single web ofcellulosic crepe of low density and high porosity is substantially theonly type of web which, when combined with the thermoplastic side of thelong fiber paper web will permit a sufficient flow of thermoplasticfibers through its pores when placed in a heat 3 sealing apparatus topermita strong peripheral bond of the walls of the envelope.

Another important consideration in the selection of the webs for theformation of the present invention is the ductibility and softness ofthe webs used. The Webs of the present invention, when subject tothepressure applied by the heat sealing elements, permit the fibers of theweb to spread and merge with the Vinyon material without completelyoccluding many of the orifices in the web.

Having now described our invention, we claim:

1. A closed envelope adapted to contain finely ground powder to bedispensed therethrough, comprising inner opposite walls made of a porouscellulosic web, and outer walls made of a composite sheet of porouscellulosie material having one surface bonded to a layer of thermoplastic material, said web being secured to the Fi1f1110- plasticmaterial of the composite sheet, the thermoplastic material at theperiphery of the outer walls extending through the porous web and beingbonded to the opposite wall of the envelope.

2. A closed envelope as set forth in claim 1 wherein said compositesheet comprises a long fibered wet strength porous cellulose having onesurface bonded to.

a layer of a copolymer of vinyl chloride and vinyl acetate.

3. A closed envelope as set forth in claim 1- wherein said cellulosicweb has a thickness of between .002 inch and .005 inch, and saidcomposite sheet has a thickness of between .00225 inch and .003 inchwith a porosity in excess of twenty-five cubic feet per square foot perminute at a pressure drop of .5 inch column of water.

4 4. An envelope for finely ground powder having walls through whichsaid powder may pass by mechanical action comprising inner facing sheetsof a porous cellulosic web, and outer composite sheets of a long fiberedwet strength porous cellulosic material having one surface bonded to alayer of thermoplastic material, said webs being bonded to thethermoplastic material of said com- References Cited in the file of thispatent UNITED STATES PATENTS 1,820,259 Wendel Aug. 25-, 19.31 2,414,833Osborne Jan. 28, 19,47 2,475,241 Hermanson July 5, 1949 2,521,985 Langet al Sept. 12, 195.0

FOREIGN PATENTS 136,724 Great Britain Dec. 29, 1919'

